/// <summary>
/// Gets the 32-bit ARGB simple color from the given hex string.
/// </summary>
/// <returns>The hex.</returns>
/// <param name="hex">Hex.</param>
public static SimpleColor FromHex(string hex)
{
if (hex == null)
{
throw new ArgumentNullException("hex");
}
if (hex.Length < 7)
{
throw new ArgumentOutOfRangeException("hex",
string.Format("The given string can never be a color: {0} too short.", hex));
}
if (hex.Length == 7)
{
return(SimpleColor.FromArgb(
Int32.Parse("FF" + hex.Replace("#", ""), System.Globalization.NumberStyles.HexNumber,
System.Globalization.CultureInfo.InvariantCulture)));
}
else if (hex.Length == 9)
{
return(SimpleColor.FromArgb(
Int32.Parse(hex.Replace("#", ""), System.Globalization.NumberStyles.HexNumber,
System.Globalization.CultureInfo.InvariantCulture)));
}
else if (hex.Length == 10)
{
return(SimpleColor.FromArgb(
Int32.Parse(hex.Replace("0x", ""), System.Globalization.NumberStyles.HexNumber,
System.Globalization.CultureInfo.InvariantCulture)));
}
else
{
throw new ArgumentOutOfRangeException("hex",
string.Format("The given string can is not a hex-color: {0}.", hex));
}
}
/// <summary>
/// Gets the 32-bit ARGB simple color from the known color enumeration.
/// </summary>
/// <param name="kc"></param>
/// <param name="alpha"></param>
/// <returns></returns>
public static SimpleColor FromKnownColor(KnownColor kc, int alpha)
{
SimpleColor knownColor = SimpleColor.FromKnownColor(kc);
return(SimpleColor.FromArgb(alpha, knownColor.R, knownColor.G, knownColor.B));
}
/// <summary>
/// Adds a basic series of triangles to render.
/// </summary>
/// <param name="corners">Triangle data.</param>
/// <param name="argb">The ARGB colors.</param>
public void AddTriangles(float[] corners, int argb)
{
lock (_triangles)
{
// a float is 4 bytes, therefore we multiply the number if
// vertices with 4.
ByteBuffer vbb = ByteBuffer.AllocateDirect(corners.Length * 4);
vbb.Order(ByteOrder.NativeOrder());
FloatBuffer vertexBuffer = vbb.AsFloatBuffer();
vertexBuffer.Put(corners);
vertexBuffer.Position(0);
// The order we like to connect them.
SimpleColor color = new SimpleColor()
{
Value = argb
};
int count = corners.Length / 3;
byte[] colors = new byte[count * 4];
for (int idx = 0; idx < count; idx++)
{
colors[idx * 4] = (byte)color.R;
colors[idx * 4 + 1] = (byte)color.G;
colors[idx * 4 + 2] = (byte)color.B;
colors[idx * 4 + 3] = (byte)color.A;
}
// a float is 4 bytes, therefore we multiply the number if
// vertices with 4.
ByteBuffer cbb = ByteBuffer.AllocateDirect(colors.Length);
cbb.Order(ByteOrder.NativeOrder());
cbb.Put(colors);
cbb.Position(0);
_triangles.Add(new TriangleProcessed()
{
Vertices = vertexBuffer,
Colors = cbb,
Count = corners.Length / 3
});
}
}
/// <summary>
/// Gets the 32-bit ARGB simple color from the specified 8-bit color values (red, green, and blue). The alpha value is implicitly 255 (fully opaque). Although this method allows a 32-bit value to be passed for each color component, the value of each component is limited to 8 bits.
/// </summary>
/// <param name="red"></param>
/// <param name="green"></param>
/// <param name="blue"></param>
/// <returns></returns>
public static SimpleColor FromArgb(int red, int green, int blue)
{
return(SimpleColor.FromArgb(255, red, green, blue));
}
/// <summary>
/// Raises the draw frame event.
/// </summary>
/// <param name="gl">Gl.</param>
public void OnDrawFrame(IGL10 gl)
{
lock (_triangles)
{
// Replace the current matrix with the identity matrix
gl.GlMatrixMode(GL10.GlProjection);
gl.GlLoadIdentity(); // OpenGL docs
gl.GlOrthof(_left, _right, _bottom, _top, -1, 1);
SimpleColor color = SimpleColor.FromKnownColor(KnownColor.White);
gl.GlClearColor(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
gl.GlClear(GL10.GlColorBufferBit);
for (int idx = 0; idx < _triangles.Count; idx++)
{
gl.GlVertexPointer(3, GL10.GlFloat, 0, _triangles[idx].Vertices);
gl.GlEnableClientState(GL10.GlVertexArray);
gl.GlColorPointer(4, GL10.GlUnsignedByte, 0, _triangles[idx].Colors);
gl.GlEnableClientState(GL10.GlColorArray);
gl.GlDrawArrays(GL10.GlTriangleStrip, 0, _triangles[idx].Count);
}
for (int idx = 0; idx < _lines.Count; idx++)
{
gl.GlVertexPointer(3, GL10.GlFloat, 0, _lines[idx].Vertices);
gl.GlEnableClientState(GL10.GlVertexArray);
color = new SimpleColor()
{
Value = _lines[idx].Color
};
gl.GlColor4f(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
gl.GlLineWidth(_lines[idx].Width);
gl.GlDrawArrays(GL10.GlLineStrip, 0, _lines[idx].Count);
}
}
}
